US 11,725,351 B2
Earth working machine having a rotatable working apparatus axially positionally retainable with high tightening torque by means of a central bolt arrangement, and method for establishing and releasing such retention
Christian Berning, Zülpich (DE); Karsten Buhr, Willroth (DE); Markus Frankemölle, Hennef (DE); Thomas Lehnert, Oberraden (DE); Andreas Salz, Neustadt (DE); and Hardy Wilhelmi, Dattenberg (DE)
Assigned to Wirtgen GmbH
Filed by Wirtgen GmbH, Windhagen (DE)
Filed on Apr. 19, 2022, as Appl. No. 17/723,904.
Application 17/723,904 is a continuation of application No. 16/933,550, filed on Jul. 20, 2020, granted, now 11,313,087.
Application 16/933,550 is a continuation of application No. 15/981,035, filed on May 16, 2018, granted, now 10,724,188, issued on Jul. 28, 2020.
Claims priority of application No. 10 2017 208 780.3 (DE), filed on May 23, 2017; and application No. 10 2017 220 518.0 (DE), filed on Nov. 16, 2017.
Prior Publication US 2022/0389670 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. E01C 23/088 (2006.01); E01C 23/12 (2006.01); E21C 47/00 (2006.01); E21C 35/193 (2006.01); F16B 19/02 (2006.01); F16B 37/14 (2006.01); F16B 39/02 (2006.01)
CPC E01C 23/088 (2013.01) [E01C 23/127 (2013.01); E21C 35/193 (2013.01); E21C 47/00 (2013.01); F16B 19/02 (2013.01); F16B 37/14 (2013.01); F16B 39/02 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A bearing component for mounting a replaceable milling drum on an earth working machine, comprising:
an annular connecting flange having a central axis;
a bearing stem protruding from the connecting flange axially in a first direction to a first axial end, the bearing stem having an outer surface including at least first and second cylindrical bearing surfaces axially spaced from each other, a furthest one of the cylindrical bearing surfaces from the connecting flange having a smaller diameter than a next furthest one of the cylindrical bearing surfaces from the connecting flange, the bearing stem having a central opening therethrough co-axial with the central axis; and
the bearing stem further including a centering recess open at a second axial end opposite the first axial end, the centering recess including an opening angle decreasing in steps so that the centering recess tapers in the first direction, the centering recess forming a portion of the central opening.